U.S. patent number 11,152,638 [Application Number 16/464,531] was granted by the patent office on 2021-10-19 for secondary battery.
This patent grant is currently assigned to LG Chem, Ltd.. The grantee listed for this patent is LG Chem, Ltd.. Invention is credited to Sang Uck Kim, Hae Jin Lim.
United States Patent |
11,152,638 |
Lim , et al. |
October 19, 2021 |
Secondary battery
Abstract
The present invention relates to a secondary battery provided
with a multi-tab. The secondary battery includes a jelly-roll in
which an electrode and a separator are stacked to cross each other
and which is wound around a central core, a plurality of multi-tab
parts extending from the electrode and formed on a predetermined
area at an end of the jelly-roll, a can member accommodating the
jelly-roll, and an insulation member disposed adjacent to the end
to insulate the can member from the jelly-roll. The insulation
member includes a central hole punched in a center of the
insulation member so that the central core passes therethrough and
a tab hole punched around the central hole to correspond to the
plurality of multi-tab parts so that the plurality of multi-tab
parts pass therethrough.
Inventors: |
Lim; Hae Jin (Daejeon,
KR), Kim; Sang Uck (Daejeon, KR) |
Applicant: |
Name |
City |
State |
Country |
Type |
LG Chem, Ltd. |
Seoul |
N/A |
KR |
|
|
Assignee: |
LG Chem, Ltd. (N/A)
|
Family
ID: |
64455544 |
Appl.
No.: |
16/464,531 |
Filed: |
May 30, 2018 |
PCT
Filed: |
May 30, 2018 |
PCT No.: |
PCT/KR2018/006172 |
371(c)(1),(2),(4) Date: |
May 28, 2019 |
PCT
Pub. No.: |
WO2018/221965 |
PCT
Pub. Date: |
December 06, 2018 |
Prior Publication Data
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|
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Document
Identifier |
Publication Date |
|
US 20190348703 A1 |
Nov 14, 2019 |
|
Foreign Application Priority Data
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|
|
|
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Jun 2, 2017 [KR] |
|
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10-2017-0068857 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H01M
50/116 (20210101); H01M 10/0587 (20130101); H01M
50/463 (20210101); H01M 10/0431 (20130101); H01M
50/155 (20210101); H01M 50/172 (20210101); H01M
10/0468 (20130101); H01M 50/107 (20210101); H01M
10/0422 (20130101); H01M 50/538 (20210101); H01M
50/179 (20210101); Y02P 70/50 (20151101); H01M
10/052 (20130101); Y02E 60/10 (20130101); H01M
50/559 (20210101); H01M 50/119 (20210101); H01M
50/548 (20210101) |
Current International
Class: |
H01M
50/172 (20210101); H01M 50/463 (20210101); H01M
50/538 (20210101); H01M 50/155 (20210101); H01M
50/107 (20210101); H01M 10/0587 (20100101); H01M
10/04 (20060101); H01M 50/116 (20210101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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1356732 |
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2833901 |
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102332554 |
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CN |
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103003980 |
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Mar 2013 |
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CN |
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106549132 |
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Mar 2017 |
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CN |
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H07094165 |
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Apr 1995 |
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JP |
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2013098102 |
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May 2013 |
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JP |
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5838073 |
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Dec 2015 |
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JP |
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20040092531 |
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Nov 2004 |
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KR |
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20080017165 |
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Feb 2008 |
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KR |
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20080047165 |
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Feb 2008 |
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KR |
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100954590 |
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Apr 2010 |
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KR |
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20110082908 |
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Jul 2011 |
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KR |
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20140087655 |
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Jul 2014 |
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KR |
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20140093077 |
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Jul 2014 |
|
KR |
|
20160129571 |
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Nov 2016 |
|
KR |
|
20170009592 |
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Jan 2017 |
|
KR |
|
20170036466 |
|
Apr 2017 |
|
KR |
|
201301634 |
|
Jan 2013 |
|
TW |
|
2013002496 |
|
Jan 2013 |
|
WO |
|
Other References
International Search Report for PCT/KR2018/006172 dated Oct. 15,
2018. cited by applicant .
Extended European Search Report including Written Opinion for
Application No. EP18810767.6 dated Jan. 14, 2020, pp. 1-12. cited
by applicant .
Search Report from Office Action for Chinese Application No.
201880007303.2 dated Jul. 22, 2021; 3 pages. cited by
applicant.
|
Primary Examiner: Cano; Milton I
Assistant Examiner: Shulman; Jenna
Attorney, Agent or Firm: Lerner, David, Littenberg, Krumholz
& Mentlik, LLP
Claims
The invention claimed is:
1. A secondary battery comprising: a jelly-roll in which an
electrode and a separator are stacked to cross each other and which
is wound around a central core; a plurality of tab parts extending
from the electrode and extending from a predetermined area at an
end of the jelly-roll, the predetermined area located radially
outside of the central hole and extending across an angle between
30.degree. and 120.degree. about the central core; a can member
accommodating the jelly-roll therein; and an insulation member
disposed adjacent to the end of the jelly-roll to electrically
insulate the can member from the jelly-roll, wherein the insulation
member comprises: a central hole extending through a center of the
insulation member so that the central core extends within the
central hole; and a single tab hole extending through a periphery
of the insulation member radially outside of the central hole and
circumferentially aligned with the predetermined area so that each
of the plurality of tab parts extends within the single tab
hole.
2. The secondary battery of claim 1, wherein the insulation member
is formed so that the central hole and the tab hole are separated
from each other by a boundary part of the insulation member.
3. The secondary battery of claim 1, wherein the insulation member
is formed so that the central hole and the tab hole merge with each
other to form a single continuous opening extending through the
insulation member.
4. The secondary battery of claim 1, wherein the insulation member
has a peripheral circumference less than a peripheral circumference
of the end of the jelly-roll.
5. The secondary battery of claim 4, further comprising a tab part
extending from the end of the jelly-roll and disposed radially
outside of an outer peripheral edge of the insulation member.
6. The secondary battery of claim 5, wherein the plurality of tab
parts and the tab part are formed on the jelly-roll by welding or
notching.
7. The secondary battery of claim 1, wherein the tab hole extends
radially outward to a portion of an outer peripheral edge of the
insulation member.
8. The secondary battery of claim 1, wherein the end is a lower end
of the jelly-roll.
Description
CROSS-REFERENCE TO RELATED APPLICATION
The present application is a national phase entry under 35 U.S.C.
.sctn. 371 of International Patent Application No.
PCT/KR2018/006172, filed on May 30, 2018, published in Korean,
which claims priority from Korean Patent Application No.
10-2017-0068857, filed on Jun. 2, 2017, the disclosures of which
are hereby incorporated herein by reference in their
entireties.
TECHNICAL FIELD
The present invention relates to a secondary battery, and more
particularly, to a secondary battery provided with a multi-tab.
BACKGROUND ART
Batteries (cells) that generate electric energy through physical or
chemical reaction to supply the generated electric energy to the
outside are used when AC power to be supplied to the building is
not obtained, or DC power is required according to the living
environments surrounded by various electric and electronic
devices.
Among such batteries, primary batteries and secondary batteries,
which are chemical batteries using chemical reaction, are being
generally used. The primary batteries are consumable batteries
which are collectively referred to as dry batteries. Also,
secondary batteries are rechargeable batteries that are
manufactured by using a material in a redox process between current
and a substance is repeatable several times. When the reduction
reaction is performed on the material by the current, power is
charged, and when the oxidation reaction is performed on the
material, power is discharged. Such the charging-discharging is
repeatedly performed to generate electricity.
A lithium ion battery of the secondary batteries is manufactured
through the following processes. An active material is applied to
each of a positive electrode conductive foil and a negative
electrode conductive foil at a predetermined thickness, and a
separator is disposed between the positive electrode conductive
foil and the negative electrode conductive foil, and then, an
electrode assembly, in which the positive electrode conductive
foil, the separator, and the negative electrode conductive foil are
wound several times in a jelly-roll or cylindrical shape, is
accommodated into a cylindrical or prismatic can, a pouch, and the
like to seal the resultant product, thereby manufacturing the
lithium ion battery.
An electrode assembly and a secondary battery including the same
according to the related art are disclosed in Korea Patent
Publication No. 10-2008-0047165.
In the secondary battery according to the related art, since the
position of the multi-tab is not constant, it is difficult to
design an insulator formed between the electrode assembly and a
can.
Thus, it is necessary to develop an insulator that is suitable for
the multi-tab.
DISCLOSURE OF THE INVENTION
Technical Problem
The present invention has been made to solve the above problem, and
thus an object of the present is to provide a secondary battery
including an insulation member that is suitable for a
multi-tab.
Technical Solution
A secondary battery according to an embodiment of the present
invention includes a jelly-roll in which an electrode and a
separator are stacked to cross each other and which is wound around
a central core, a plurality of multi-tab parts extending from the
electrode and extending from a predetermined area at an end of the
jelly-roll, a can member accommodating the jelly-roll therein, and
an insulation member disposed adjacent to the end of the jelly-roll
to electrically insulate the can member from the jelly-roll,
wherein the insulation member includes a central hole extending
through a center of the insulation member so that the central core
extends within the central hole and a tab hole extending through a
periphery of the insulation member radially outside of the central
hole so that the plurality of multi-tab parts extends within the
tab hole.
The predetermined area may be circumferentially aligned with an
area of the insulation member extending across an angle between
30.degree. and 120.degree. about the central core.
The tab hole may be formed in a position circumferentially aligned
with the predetermined area.
The insulation member may be formed so that the central hole and
the tab hole are separated from each other by a boundary part of
the insulation member.
The insulation member may be formed so that the central hole and
the tab hole communicate with each other.
The insulation member may have a peripheral circumference less than
a peripheral circumference of the end of the jelly-roll.
The secondary battery may further include a tab part extending from
the end of the jelly-roll and disposed radially outside of an outer
peripheral edge of the insulation member.
The tab hole may extend radially outward to a portion of an outer
peripheral edge of the insulation member.
The plurality of multi-tab parts and the tab part may be formed on
the jelly-roll by welding or notching.
The end may be a lower end of the jelly-roll.
Advantageous Effects
According to the present invention, the jelly-roll including the
multi-tab and the can member may be insulated from each other.
According to the present invention, the insulation member may be
stably fixed between the jelly-roll including the multi-tab and the
can member.
According to the present invention, the position at which the
multi-tab is formed may be standardized to easily manufacture the
multi-tab.
According to the present invention, the insulation member installed
between the jelly-roll including the multi-tab and the can member
may be minimized in size to reduce the weight of the secondary
battery.
According to the present invention, the insulation member installed
between the jelly-roll including the multi-tab and the can member
may have the circumference less than that of the end of the
jelly-roll to facilitate the additional design of the tab part.
The present invention may be applied to the multi-tab that is
manufactured through various methods.
The present invention may be easily applied to the negative
electrode multi-tab.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a secondary battery according to an
embodiment of the present invention.
FIG. 2 is a side view illustrating only a jelly-roll and a
multi-tab part of the secondary battery according to the present
invention.
FIG. 3 is a bottom view of FIG. 2.
FIG. 4 is a plan view illustrating only an insulation member of a
secondary battery according to another embodiment the present
invention.
MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a secondary battery according to an exemplary
embodiment of the present invention will be described in detail
with reference to the accompanying drawings.
Terms or words used in the specification and claims should not be
construed as limited to a lexical meaning, and should be understood
as appropriate notions by the inventor based on that he/she is able
to define terms to describe his/her invention in the best way to be
seen by others. Therefore, embodiments and drawings described
herein are simply exemplary and not exhaustive, and it will be
understood that various equivalents may be made to take the place
of the embodiments.
In the drawings, the dimension of each of components or a specific
portion constituting the component is exaggerated, omitted, or
schematically illustrated for convenience in description and
clarity. Thus, the dimension of each element does not entirely
reflect an actual size. Moreover, detailed descriptions related to
well-known functions or configurations will be ruled out in order
not to unnecessarily obscure subject matters of the present
invention.
FIG. 1 is a perspective view of a secondary battery according to an
embodiment of the present invention, FIG. 2 is a side view
illustrating only a jelly-roll and a multi-tab part of the
secondary battery according to the present invention, and FIG. 3 is
a bottom view of FIG. 2.
As illustrated in FIGS. 1 to 3, a secondary battery according to an
embodiment of the present invention includes a jelly-roll 10 in
which an electrode and a separator are stacked to cross each other
and which is wound around a central core 3, a plurality of
multi-tab parts 11 extending from the electrode and formed on a
predetermined area a at an end 10a of the jelly-roll 10, a can
member 1 accommodating the jelly-roll 10, and an insulation member
20 disposed adjacent to the end 10a to insulate the can member 1
from the jelly-roll 10. The insulation member 20 has a central hole
23 punched in a center of the insulation member 20 so that the
central core 3 passes therethrough and a tab hole 25 punched around
the central hole 23 to correspond to the plurality of multi-tab
parts 11 so that the plurality of multi-tab parts 11 pass
therethrough.
The jelly-roll 10 may be manufactured by winding a stack, in which
a positive electrode, a separator, and a negative electrode are
stacked, in a jelly-roll shape.
The positive electrode may be an aluminum plate and include a
positive electrode active material portion coated with a positive
electrode active material and a positive electrode non-coating
portion which is not coated with the positive electrode active
material.
The negative electrode may be a copper plate and include a negative
electrode active material portion coated with a negative electrode
active material and a negative electrode non-coating portion which
is not coated with the negative electrode active material.
The separator may be stacked between the positive electrode and the
negative electrode to separate the positive electrode from the
negative electrode.
As described above, the electrode according to the present
invention may be at least one of the positive electrode and the
negative electrode, which form the jelly-roll.
The plurality of multi-tab parts 11 and a tab part 13 may be bonded
to each other by notching the non-coating portion of the electrode
to extend from the electrode or by welding the plurality of
multi-tab parts 11 and the tab part 13 to the non-coating portion
of the electrode.
Thus, the insulation member 20 may be installed on all the
jelly-roll 10 including the multi-tab parts 11 formed by the
notching or welding.
The plurality of multi-tab parts 11 may be formed on the end 10a of
the jelly-roll 10.
The plurality of multi-tab parts 11 may be formed on a lower end of
the end 10a of the jelly-roll 10.
The plurality of multi-tab parts 11 may be negative tabs extending
from the negative electrode of the electrode.
The plurality of multi-tab parts 11 may have different lengths to
be electrically connected to the can member 1.
Each of the plurality of multi-tab parts 11 may have a length that
gradually decreases from the end 10a of the jelly-roll 10 toward
the central core 3 so as to be easily electrically connected to the
can member 1.
The predetermined area "a" may correspond to an area corresponding
to an angle of 30.degree. to 120.degree. (see FIG. 3) about the
central core 3 at the end 10a of the jelly-roll 10.
As described above, the plurality of multi-tab parts 11 may be
formed on the predetermined area "a" at the end 10a of the
jelly-roll 10 to standardize formation positions of the plurality
of multi-tab parts, thereby facilitating the manufacture.
The can member 1 may be a container made of a metal material and
having a shape that is opened substantially upward in the
cylindrical secondary battery. Here, iron (Fe), on which aluminum
(Al) or nickel (Ni), which is light and easy to cope with
corrosion, is plated may be used as the metal material.
In the insulation member 20, the central hole 23 is punched in the
center, and the tab hole 25 is punched around the central hole
23.
The insulation member may have a circumferential length less than
that of the end 10a of the jelly-roll 20.
Also, when the tab part 13 is formed on the circumference of the
end 10a of the jelly-roll 20, the tab part 13 may extend beyond the
outside of an edge of the insulation member 20. Thus, an additional
tab part 13 may be easily formed on the end 10a.
The central core 3 may pass through the central hole 23. In some
case, an electrode tab (not shown) formed on the end 10a of the
jelly-roll 10 may pass through the central hole 23.
The tab hole 25 may be formed in a position corresponding to that
of the predetermined area "a" at the end 10a of the jelly-roll
10.
That is, when the insulation member 20 is installed on the end 10a
of the jelly-roll 10, the tab hole 25 may be formed in a position
corresponding to the predetermined area "a" of the end 10a in the
insulation member 20 to induce the multi-tab part 11 so that the
multi-tab part 11 formed on the predetermined area a of the end 10a
of the jelly-roll 10 easily passes through the tab hole 25.
Also, the tab hole 25 may be punched at a position corresponding to
the predetermined area "a" of the end 10a in the insulation member
20 and may be opened up to a portion of the edge of the insulation
member 20.
Also, the tab hole 25 may communicate with the central hole 23.
In addition, when the tab hole 25 communicating with the central
hole 23 is formed in the insulation member 20, a body 20a of the
insulation member 20 may be minimized to reduce a weight.
FIG. 4 is a plan view illustrating only an insulation member of a
secondary battery according to another embodiment of the present
invention.
As illustrated in FIG. 4, in a secondary battery according to
another embodiment of the present invention, a central hole 23 and
a tab hole 25 of an insulation member 10 are formed to be separated
from each other.
To separate the central hole 23 from the tab hole 25, a boundary
part 27 may be formed between the central hole 23 and the tab hole
25.
A central core 3 may be inserted into and coupled to the central
hole 23 by the boundary part 27, and thus, the insulation member 10
may be guided to be fixed in a proper position at an end 10a of the
jelly-roll 10, and the position of the insulation member 10 may be
stably maintained without moving in a transverse direction.
As described above, according to the present invention, the
jelly-roll including the multi-tab and the can member may be
insulated from each other.
According to the present invention, the insulation member may be
stably fixed between the jelly-roll including the multi-tab and the
can member.
According to the present invention, the position at which the
multi-tab is formed may be standardized to easily manufacture the
multi-tab.
According to the present invention, the insulation member installed
between the jelly-roll including the multi-tab and the can member
may be minimized in size to reduce the weight of the secondary
battery.
According to the present invention, the insulation member installed
between the jelly-roll including the multi-tab and the can member
may have the circumference less than that of the end of the
jelly-roll to facilitate the additional design of the tab part.
The present invention may be applied to the multi-tab that is
manufactured through various methods.
The present invention may be easily applied to the negative
electrode multi-tab.
Although the secondary battery according to the present invention
has been described above with reference to the exemplary drawings,
various changes and modifications may be made thereto by one
skilled in the art without departing from the scope and spirit of
the invention as set forth in the appended claims.
* * * * *